According to Mancini, Madoff had been very upset with his two sons for refusing to speak to him and told Mancini that he would have forgiven his own father in the same situation.

Nonetheless, "nothing would have caused him not to be able to come to the funeral, in my opinion," said Mancini, speculating that the prison probably would not have allowed it.

How guilty does Madoff act behind bars?

"I've never seen Bernie cry," said Mancini, though he said that Madoff appeared upset at what he'd done, and realized he had hurt a great many people. Still, Mancini conceded that Madoff's actions were a "disgrace."

"Four or five people have died for it."

Fox News also asked if Madoff had spoken about the involvement of possible accomplices. "He said that there was a lot of people that were close to him in whatever situation that did know things," said Mancini, though Madoff maintained that his sons did not know anything, nor did his wife.

Could the Russian mob (as has been rumored) get to Madoff in prison?

"I don't see anything like that happening."

Mancini has a book coming out about sharing a cell with Madoff. Working title? "Madoff Uncuffed." Video of the interview below.

Get THE DRONES REPORT now! Commercial drones are already a reality. BI Intelligence takes an in-depth look at the most important aspects, including market forecasts for commercial applications, regulatory process, and the leading players. Get the Report Here &raquo